Specifying meta field’s column type in Database using add_post_meta

When you use add_post_meta, no column in database is created. All post meta data is stored in wp_postmeta table (https://codex.wordpress.org/Database_Description#Table:_wp_postmeta). Here’s the structure of that table:

enter image description here

  • post_id is the ID of post that this meta data is assigned to
  • meta_key is the key of meta (in your case favourite_fruit_code)
  • meta_value is the value of that meta

So you’re not able to set the type of column, because there is no column, and you’re not able to set the type of value, because all values are stored as LONGTEXT.

On the other hand, there is no need for setting the type of this column. You should sanitize and validate the values before setting them, and you can use meta_type in your meta query, so the values are compared correctly.

Related Posts:

  1. Right way of storing large number of custom post fields
  2. Custom post type or just use custom fields
  3. Using posts and postmeta table to store custom Address Book Plugin data
  4. WP All Import – Using Xpath to set a select value
  5. Sorting custom post type columns with external data and without meta values
  6. Store CPT ‘Reviews’ average ratings to a WordPress DB table or to a DB custom table?
  7. Importing Data from a Non-WordPress database, into WP
  8. Ideas to connect external database table to wordpress posts as custom field source
  9. delete duplicate meta_value with same post_id
  10. Having a repeating custom field in admin custom post type, what I’d go better with, for DB’s sake? ACF repeater or query a different post type?
  11. when looping through custom post data not appearing
  12. custom post types, custom fields and normalization
  13. How to replicate data storage and querying using WordPress. Custom posts/fields or Custom db tables?
  14. Confused about where to store my data
  15. Populate custom post type/custom fields from an external database
  16. Automatically convert standard posts with custom fields to custom post types
  17. How to enable the user to add value through the admin panel?
  18. Displaying database table in backend of wordpress
  19. Custom Post Type Data in Sidebar widgets?
  20. Custom Post Types, or completely custom?
  21. Hide custom post type field from author?
  22. Many to Many Relationship between Two Custom Post Types
  23. Sorting a query by custom field date
  24. wordpress plugin error handling
  25. Creating Photo Gallery System with Custom Post Type
  26. Set post title from two meta fields
  27. How to sort CPT by custom meta value (date), and return posts month by month
  28. Trying to save custom post type from frontend partially working
  29. Custom Taxonomy order by Custom Field
  30. Comparing timestamps in meta query doesn’t work
  31. Is there any performance consideration when using Custom Post Types?
  32. Custom Post Type Navigation on Custom Field
  33. how to interconnect custom post types?
  34. Saving Custom Post types and fields to a custom table
  35. Adding dropdown select meta box to custom post type – seems restAPI is interfering
  36. Filter custom posts using auto populated dropdown selectors
  37. Querying Two Custom Post Types with OR Not Working
  38. How can I get the number of custom post type posts that have a specific attachment image set?
  39. Add custom field to Posts and sort by it
  40. Two Custom Post Types Many to Many Relationship
  41. Show image gallery from a custom field
  42. Using advanced custom fields from one custom post type in another custom post type / using nested shortcodes
  43. filter custom post in rest api with custom function
  44. Custom Fields for Custom Post [closed]
  45. Is there any way to add a “custom field” to the CPT archive page?
  46. Organize WordPress site, so it can maintain with huge database
  47. don’t publish custom post type post if a meta data field isn’t valid
  48. WebP Fallback for Inline Background Image in Style Attribute
  49. How can meta boxes be added to “unknown” custom posts?
  50. Custom “radio button meta box” not saving correctly
  51. Check if post with same meta value exists
  52. custom post data – how to
  53. How to get a custom type post data when it has a connection with another custom type post?
  54. WP_Query orderby not work with meta_key
  55. Having Issue on Ordering CPT by Custom Field In Custom WP Query
  56. How do I replace the post title with a custom field?
  57. Custom Post type loop with ACF not displaying properly
  58. Reusable metabox backend and frontend
  59. How to display wp_post by custom field value?
  60. How can I output WPAlchemy repeating fields meta values in my page template?
  61. WordPress as a frontend website for iOS app [closed]
  62. Get A Custom Field From A Custom Taxonomy Of A Custom Post Type [closed]
  63. Custom post types category
  64. “Custom Field” to Excerpt field” for pages? [closed]
  65. How to import database table as custom post type and custom fields?
  66. Custom Taxonomy dont save in a frontend form for post a custom post
  67. Update custom field value
  68. Insert custom fields to a custom post type
  69. Fill custom fields when saving custom post types
  70. Should i use custom post type for a custom footer?
  71. Use Gravity Forms and a Shopping Cart for output to Freshbooks for an Estimate [closed]
  72. A sports wordpress website
  73. Migrate Custom Post Type with Custom Fields data and parent child order
  74. Custom taxonomy terms as children of multiple custom post types
  75. Custom Post Type meta data getting deleted on bulk editing taxonomies
  76. wp_set_object_terms creates taxonomies but does not add custom posts to it
  77. How to access repeater field of a custom field?
  78. PHP Warning with Custom Fields
  79. Custom post types & Pages hierarchy – Error 404
  80. filter rest api post by a acf filed
  81. How to prepend text to custom field value A, but only if custom field value B matches a certain string?
  82. Custom post type that lets users create a set of posts?
  83. How do I extract the contents of a CPT’s custom field for all posts?
  84. Delete custom post type metadata without deleting the post in admin area
  85. Creating multiple CPT posts from one Gravity form
  86. Function not pulling image or text from custom post type
  87. Order Custom Posts by Several Fields
  88. Custom field totals
  89. Repeatable custom meta select boxes
  90. 404 on Pages for Custom Post Type & Query_Posts
  91. Types plugin isn’t compatible with my custom post type
  92. Show Posts in Vertical Tabs with Scrollbar
  93. How do I filter a custom post type loop by a field?
  94. Custom Post type as Taxonomy
  95. Display div based on Group metabox selection [closed]
  96. Display ACF object field data using Elementor Custom Query
  97. Sortable admin columns ordering from custom fields isn’t combine com search and Dropdown filter
  98. WordPress custom field sorting, weird behavior: the latest post is at the end
  99. I want to understand plugin implementation of custom posts / taxonomies / metaboxes
  100. How to consume external API from WordPress post editor and display the response data in the custom field?
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)